diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa3b7f8..5c74acd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 card.io Android SDK change log and release notes
 ================================================
 
+5.4.2
+-----
+* Add Mastercard 2-series support.
+* Bump compile SDK to 24 for reals.
+* Compile distributed package with NDK to r12b (previous was r11c).
+* Update Android Gradle plugin to 2.2.0.
+
 5.4.1
 -----
 * Add ability to specify an alternative search path for the native libraries via `CardIONativeLibsConfig` [card.io-Android-source#86](https://github.com/card-io/card.io-Android-source/pull/86). Thank you Thorben Primke!
diff --git a/README.md b/README.md
index 1d365a6..db63b52 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ All releases follow [semantic versioning](http://semver.org/).
 The latest version is available via `mavenCentral()`.  Just add the following dependency:
 
 ```
-compile 'io.card:android-sdk:5.4.1'
+compile 'io.card:android-sdk:5.4.2'
 ```
 
 You can receive updates about new versions via a few different channels:
@@ -46,7 +46,7 @@ A manual entry fallback mode is provided for devices that do not meet these requ
 ##### If you use gradle, then add the following dependency from `mavenCentral()`:
 
 ```
-compile 'io.card:android-sdk:5.4.1'
+compile 'io.card:android-sdk:5.4.2'
 ```
 
 ##### If you use something other than gradle, then:
diff --git a/SampleApp/build.gradle b/SampleApp/build.gradle
index 191b106..ac8ec08 100644
--- a/SampleApp/build.gradle
+++ b/SampleApp/build.gradle
@@ -3,7 +3,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.2'
+        classpath 'com.android.tools.build:gradle:2.2.0'
     }
 }
 
@@ -52,7 +52,7 @@ dependencies {
     if (parent != null) {
         compile project(':card.io')
     } else {
-        compile 'io.card:android-sdk:5.4.1'
+        compile 'io.card:android-sdk:5.4.2'
     }
 }
 
diff --git a/aars/card.io-5.4.1.aar b/aars/card.io-5.4.2.aar
similarity index 78%
rename from aars/card.io-5.4.1.aar
rename to aars/card.io-5.4.2.aar
index 8076148..0a1cd33 100644
Binary files a/aars/card.io-5.4.1.aar and b/aars/card.io-5.4.2.aar differ